Drag-saw



(No Model) 4 SheetsSheet 1.

A. CUNNINGHAM. DRAG SAW.

1 T0v.606,051. Patented June 21,1898.

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A. CUNNINGHAM. DRAG SAW.

v; 1- Patented JunaZl, 1898.

' ,4 Sheets-Sheet 3. A. CUNNINGHAM.

DRAG SAW. No. 606,051. PatentedJune 21,1898.

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(No Model.)

Patented June 21-, 1898.

llN'i'rnn STATES PATENT Ui ricn.

,ALBERT CUNNINGHAM, or MILWAUKEE, wIsooNsIN, ASSIGNOR TO THE FILER &STOWELL COMPANY, on wIsooNsIN.

IDRAG-TSAW.

SPECIFICATION forming part of Letters ratent No. 606,051,- dated June21, 1898.

Application filed November 9, 1856. Serial No. 611,499. (No model.)

"0 alt whom it may concern:

Be it known that I, ALBERT CUNNINGHAM, of Milwaukee, in the county ofMilwaukee and State of \Vis'consimhave invented certain new and usefulImprovements in Drag- Saws; and I do hereby declare that the followingis a full, clear, and exact description of the invention, which willenable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying drawings,- and to theletters of reference marked thereon, which form a part of thisspecification.

The main objects of my invention are to facilitate cutting logs to thedesired lengths and generally to improve the construction and operationof machines for this purpose. It consists in certain novel features inthe construction and arrangement of component parts of the machine, ashereinafter particularly described, and pointed out in the claims.

In the accompanying drawings like letters designate the same parts inthe several figures.

Figure l is a side elevation of myimproved machine in connection with alog way, c011- veyer, and dogging device with which the machine isprimarily. designed to be used. Fig. 2 is a vertical longitudinalsection, on an enlarged scale, of the actuating, tilting, adjusting, andguide connections of the saw. Fig. 3 is a plan View of the same. ahorizontal section, on the line 4 4, Figs. 2 and 8, of the tiltingmechanism. Fig. 5 is a Vertical longitudinal section of the trunnion onwhich the main cylinder swings, showing in elevation a part of thetilting connections and the steam or fluid pressure supply connection.Fig. 6 is a cross-section, on the line 6 6, Fig. 2, of the saw-guidingand valveactuating devices. Fig. 7 is a detail View, on an enlargedscale, of the valve controlling the admission and exhaust of theactuating mediumto and from the auxiliary cylinder. Fig. Sis across-section of the same and of a portion of the auxiliary cylinder onthe line 8 S, Fig. 7; and Fig. 9 is a horizontal longitudinal section,on the line 9 9,-Fig. 2, of the cross-head by which the outer end of themain piston-rod is guided and attached to the saw.

Fig. 4. is

as they are hauled into the mill; but it may be used for other similarpurposes, either with or without the log way, conveyor, and doggingdevice.

Referring to the drawings, A designates a hollow cylindrical trunnionsupported horizontally and adapted to turn' at the ends in suitablebearings, which may be conveniently formed in brackets a a, bolted touprights.

B is a cylinder, which may be designated the main or .workin g cylinder,provided at one end with a transverse box or sleeve Z), which is fittedto slide endwise on the trunnion A. This box is preferably made in twoparts or halves, one of which forms a cylinder-head. They-are boltedtogether upon the trunnion, which iscaused to turn therewith in swingingthe cylinder up and down by means of a key or feather h, as shown inFig. 2; The trunnion is formed orprovided on one, preferably the rear,side with a longitudinal rack a, and in the cap of the box I) isjournaled transversely tothe axis of the trunnion a shaft 0, providedwith a pinion c, engaging said rack, and at its upper end with a crankor hand wheel 0, for turning said pinion and moving the cylinderlaterally upon said trunnion.

D is a piston fitted to work in cylinder B and provided with apiston-rod d, which passes through a stuffing-box in the cylinder-head,opposite said trunnion. To the outer end of said piston-rod'is attacheda cross-head E.

F is an arm formed with or attached to the outer cylinder-head andformed with guide- Ways f f, parallel with each other and with the axisof the cylinder. A guide-block G, fitted to slide in said ways, isattached to the cross-head E and serves to rigidly support the outer endof the piston-rod and the end of the saw attached thereto in ali'nementwith the axis of the cylinder. The cross-head E is made in two parts, asshown in Figs. 6 and 9, which are rigidly clamped by bolts upon the endof the piston-rod d and upon one end of the saw H. The inner faces ofthe two parts of the cross-head are recessed to form a vertical slot forthe reception of the saw, and they, as well as the saw, are formed witha transverse opening to receive the fastening devices by which the sawis clamped and firmly held in the crosshead. These fastening devicesconsist of a key 6, which passes transversely through said opening andengages on its rear face, which is preferably notched, as shown in Fig.9, with the rear edge of the opening in the saw, and of two wedge-blocksc e, which are inserted in said opening on opposite sides of the saw,abutting at their backs against the key e, bearing on their oppositefaces, which are inclined against correspondiugly-inclined faces on theparts of the cross-head in the front of said opening and connected by abolt 2 by which they are drawn inwardly on their inclined bearing-faces,thereby clamping the parts of the cross-head against the sides of thesaw and forcing the key a rearwardly against the saw and the rear end ofthe saw against the shoulders in the parts of the cross-head. By thisconstruction a single bolt serves to firmly clamp and rigidly hold thesaw in the crosshead, and the attachment and detachment of the saw canbe effected easily and quickly.

I is a cylinder, which maybe designated the auxiliary or tiltingcylinder. It is cast with or attached to the under side of the maincylinder B lengthwise thereof and is provided with a piston J, the rod jof which passes through a stuffing-box in the rear end and a guidingsleeve or bearing j, formed on or attached to the rear end of cylinderB.

K is a cylindrical rod or shaft which is supported below and parallelwith the trunnion A in the brackets to a. 7a is a sleeve fitted to turnand slide endwise on said shaft. It is connected with the piston-rod jby a link 71:, pivoted at one end to a collar which is clamped on saidpiston-rod and at the other end to said sleeve, the pivot connections ofsaid link being arranged transversely to each other and to saidpiston-rod and shaft. The sleeve 71? is formed or provided with anupwardly-extendin g forked arm H, which loosely embraces the piston-rodj and by which said sleeve is moved endwise on the shaft K by thelateral movement of the cylinders.

L designates the main valve-chamber,which is mounted on top of thecylinder 13 and communicates with the ends thereof through passages 1) 5as shown in Fig. 2. It also communicates through ports and passages b bwitha common exhaust passage or connection If. Z is a valve fitted towork in said chamber and controlling the admission and exhaust of thesteam or other actuating medium to and from the ends of the cylinderthrough said passages b and the ports and passages W. In the position inwhich the valve is shown in Fig. 2 steam is admitted to the right-handend of the cylinder and exhausted from the lefthand end. The stem Z ofsaid valve projects is provided with collars Z P, adjustably securedthereon, and between said collars with a tappet Z which is connected bya forked link or red Z with an arm at on a rock-shaft M, supportedtransversely upon the guidearm F. This rock-shaft M is connected by atelescoping arm m with the cross-head E, from which it receives itsrocking movement. By making the arm on in parts which telescope witheach other its projection below the cross-head E and its liability tostrike obstructions in lowerin g the saw when the machine is inoperation are avoided. Between the collars Z and the tappet Z areinterposed upon the valve-stem Z spiral springs Z Z or elastic buffers,which prevent the tappet from striking the collars abruptly and allow ittomove in either direction beyond the limits of the movement of thevalve without breaking or injuring the valve-operating connections.

The steam or other actuating medium is supplied to the valve-chamber Lby a pipe or passage N through a valve-case 0, provided with a valve 0,by which its admission to the main valve-chamber may be cut off whendesired. Passing through the box Z) and a longitudinal slot or opening ain the upper side of trunnion A, upon which the main cylinder swings,said pipe N projects axially through one end of said trunnion into amain supplypipe N, in which it is adapted to turn and telescope. Thepipe 1" is secured in abonnet a, which is attached to one of thebearings in which thetrunnion turns, over the end of the trunnion, andis formed with a stuffing-box around the pipe N, as shown in Fig. 5.

P is a valve ease or cover attached to the auxiliary cylinder I andformed with passages p p, communicating with opposite ends of saidcylinder and with the valve-chamber through ports 1) p, as shown inFigs. 4, 7, and 8. It is also formed with an exhaust-passage 232, whichcommunicates with the valve-chamber through a port 13 between theports 1) p.

Q is a valve inclosed by the cover P in a recess or chamber formed inthe cylinder I. It is formed in one face with a recess g, which when thevalve is in its middle position, as shown in Figs. 4. and 7, connectsthe several ports 1) and 19 thus establishing communication between bothends of the cylinder and the exhaust-passagep Said valve has a stem g,which projects laterally through the cover P and is provided at itsouter end with a handle g for manually operating the valve. liy turningthis valve in one direction or the other from its central position thesteam or actuating medium which is supplied to the valve-chamber may beadmitted to either end of the auxiliary or tilting cylinder I, while theother end of said cylinder is opened to exhaust. The pipe R connects thechamber of the valve Q, with the valve-case O, or this IIO connectionmay be made with any convenient part of the steam or fluid pressuresupply connection, such as the pipe N.

The saw and its actuating and tilting cylinders and their connectionsare counterbalanced by a weighted lever S, which is connected at one endby a link swith the guidearm F, provided at the opposite end with aweight 5- and fulcrumed at an intermediate point by a universal joint. 8to a suitable support above the main cylinder, as shown in Fig. 1.

T designates a log way and conveyer passing transversely under the sawH, and U U are dogs for grasping and holding a log upon said way whileit is severed by said saw, as shown in Fig. 1.

Myimproved machine operates as follows: The saw being raised, a log isdrawn and stopped underneath it upon the conveyer T. In this positionthe dogs U U are closed against it and the saw H is lowered by turningthe valve Q and admitting steam to the inner end of cylinder I. Steambeing admitted to the valve-chamber L by opening the valve 0 isautomatically admitted to and exhausted from opposite ends of the maincylinder B by the action of the valve Z, driving the piston D back andforth therein. When the log has been severed, the valve Q is reversed,admitting steam to the outer end of the auxiliary cylinder I andexhausting it from the opposite end, and the saw is thus swung upwardlyclear of the log. The valve Q is then turned to its middle position andthe steam exhausted from both ends of the auxiliary cylinder, theWeight'on the lever S being suflicient to counterbalance the saw and itsconnections and hold them in any position in which they may be left. Incase the log is not stopped in the desired position for makin g the cutwith the drag-saw the latter is adjusted sidewise to the desired pointby turning the hand-wheel 0, thereby shifting the machine endwise uponthe trunnion A. In handling large heavy logs it is very difficult, ifnot impossible, to stop them on the log way and conveyer at or close tothe points where it is desired to sever them by the drag-saw, so thatthe provision for easily and quickly adjusting the saw sidewise is amatter of great convenience and economy of time and labor in theoperation of the mill.

I do not wish to be understood as limiting myself to exact details ofconstruction herein shown and described, as they may be variouslymodified within the spirit and intended scope of my invention.

When a sidewise adjustment of the saw is not necessary or desired, thetrunnion A may be made short and cast with or rigidly secu red to thecylinder B or its head.

I clain1+ 1. In a machine for cutting logs or timber to the desiredlength, the combination with a suitable support, of a main cylinderpivoted thereto so as to swing vertically, a piston fitings, a cylindermounted at one end upon and movable endwise of said trunnion, a pistonfitted to work in said cylinder, and a saw rigidly attached to thepiston-rod, substantially as and for the purposes set forth.

3. In a machine for cutting logs and timber to length, the combinationwith a trunnion supported and adapted to turn in suitable bearings, amain cylinder provided at one end with a transverse box fitted to slidee'ndwise upon said trunnion, a piston fitted to work in said cylinder, asaw rigidly attached to the rod of said .piston, an auxiliary cylin-.

der attached to the main cylinder and provided with a,piston which has asliding pivot connection with a rod parallel with said trunnion,substantially as and for the purposes set forth.

4. In a machine for cutting logs and timber to length, the combinationwith. a trunnion supported horizontally in suitable bearings and formedor provided with a longitudinal rack, a cylinder having a transverse boxat one end mounted upon and movable endwise of said trunnion, a shaftjournaled in said box and provided with a pinion engaging said rack, apiston fitted in said cylinder and pro vided with a rod and a sawattached to the piston-rod, substantially as and for the purposes setforth.

5. In a machine for cutting logs and timber to length, the combinationwith a trunnion supported horizontally and adapted to turn in suitablebearings, of a main cylinder having a box at one end fitted to slideendwise upon said trunnion, a shaft journaled in said box and providedwith a pinion which meshes with a longitudinal rack on said trunnion, anauxiliary cylinder attached lengthwise to the main cylinder and providedwith a piston, a stationary rod parallel with said trunnion, a sleeve orcollar movable endwise thereon and linked to the auxiliary piston, apiston fitted in the main cylinder and provided with a rod, and a sawattached to the rod of the main piston, substantially as and for thepurposes set forth.

- 6. In a machine for cutting logs and timber to length, the combinationof a horizontallyarranged trunnion, a main cylinder havinga transversebox mounted upon and movable endwise of said trunnion, an auxiliarycylinder attached lengthwise to the main cylinder and provided with apiston, a stationary rod parallel with said trunnion, a sleeve or collarmovable endwise thereon, linked to the auxiliary piston-rod and having aguide loosely engaging it, a piston fitted in the main IIO cylinder andprovided with a rod, and a saw attached to the main piston-rod,substantially as and for the purposes set forth.

7. In a machine for cutting logs and timber to length, the combinationwith a hollow trunnion, a vertically-swinging and laterally-movablecylinder mounted thereon at one end and provided with apiston, a sawattached to the piston-rod, a valve controlling the supply and exhaustof the actuating medium to and from opposite ends of said cylinder, anda telescopin g fluid-pressure-supply connection through said trunnionwith the valve-chamber, substantially as and for the purposes set forth.

8. In a machine for cutting logs and timber to length, the combinationwith a hollow or recessed trunnion supported horizontally in suitablebearings, a cylinder having a transverse box mounted upon and movableendwise of said trunnion, a valve-chamber connected with opposite endsof said cylinder by passages, a valve for controlling the supply andexhaust of the actuating medium to and from the cylinder, afiuid-pressure-supply pipe attached to one end of said trunnion, a pipetelescoping with said supply-pipe and connecting it with the valve-case,a piston fitted to work in said cylinder and a saw attached to thepiston-rod, substantially as and for the purposes set forth.

9. In a machine for cutting logs and timber to length, the combinationwith a trunnion supported horizontally and adapted to turn in suitablebearings, a laterally-adjustable cylinder mounted at one end upon saidtrunnion, a valve-chamber connected by passages with the ends of saidcylinder, a valve controlling communication between said chamber andcylinder through said passages, a fluidpressure-supply pipe, a pipearranged axially in said trunnion to turn and telescope in saidsupply-pipe and connecting itwith said valvechamber, a piston fitted toWork in said cylinder and a saw attached to the piston-rod,substantially as and for the purposes set forth.

10. In a machine for cutting logs and timber to length, the combinationwith a cylinder and piston of a slotted head attached to the outer endof the piston-rod and formed with a transverse opening through it, a sawhaving a corresponding opening through one end, a key passingtransversely through the opening in the head and saw, two wedgeblocksinserted in said opening on opposite sides of the saw, and a boltconnecting said blocks for drawing them together, clamping the sides ofthe head against the saw and forcing and holding the key against theback of the opening in the saw and the end of the saw against the end ofthe slot in the head, substantially as and for the purposes set forth.

11. In a machine for cutting logs and timber to length, the combinationof a verticallyswinging cylinder and piston having laterallyfiadjnstablepivot connections with a suitable support, a saw attached to the outerend of the piston-rod, and a lever having a flexible or jointedconnection at one end with said cylinder, a counterweight at the otherend and a universally-j ointedf ulcru m connection with a suitablesupport at an intermediate point, substantially as and for the purposesset forth.

12. In a machine for cutting logs and timber to length, the combinationof a verticallyswinging cylinder and piston pivotally connected at oneend with a suitable support, a saw attached to the outer end ,of thepistonrod, a valve controlling the admission and exhaust of theactuating medium to and from opposite ends of said cylinder and havingoperating connections with the piston-rod, a fluid-pressure-supplyconnection with the valve-chamber, an auxiliary cylinder attached to themain cylinder and provided with a piston which is connected with asupport so as to swing the main cylinder and its attachments on theirpivot-bearing, a fluid-pressuresupply connection communicating withopposite ends of the auxiliary cylinder, and a valve in said connectionfor controlling the admission and exhaust of the actuating medium to orfrom either end of said cylinder, substantially as and for the purposesset forth.

13. In a machine for cutting logs and timber to length, the combinationof a verticallyswinging cylinder and piston having at one end alaterally-movable pivot connection with a suitable support, a sawattached to the piston-rod, an auxiliary cylinder attached to the maincylinder and provided with a piston the rod of which is guided at itsouter end in a bearing attached to the main cylinder, a rod parallelwith the axis on which the main cylinder swings,a sleeve mounted uponand movable endwise of said rod and having a guiding projection looselyengaging the auxiliary piston-rod, and a link pivoted at the ends to andconnecting said sleeve and auxiliary piston-rod, substantially as andfor the purposes set forth.

14:. In a machine for cutting logs and timber to length the combinationwith a log Way and conveyer and dogging device for immovably holdinglogs thereon, of a verticallyswinging cylinder pivotally connected witha suitable support, a piston fitted to work in said cylinder, a sawrigidly attached to the piston-rod and extending therefrom transverselyover said log way and conveyor, and an auxiliary cylinder attached tothe main cylinder and provided with a piston which is connected with afixed support and is adapted to turn the main cylinder and saw up anddown upon their pivot connection, substantially as and for the purposesset forth.

15. In a machine for cutting logs and timber to length, the combinationof a verticallyswinging cylinder and piston having a pivot connection atone end with a suitable support, a saw attached at one end to thepistonrod, and an auxiliary cylinder and piston eonn'ected with the maincylinder and arranged to swing it an d the saw vertically, substantiallyas and for the purposes set forth.

16. In a machine for cutting logs and timber to length, the combinationof a verticallyswinging cylinder and piston having alaterally-adjustable pivot connection with a suitable support, a' sawattached to the pistonrod, and an auxiliary cylinder and pistonconnected with said main cylinder in such manner as to swing itvertically and permit of its lateral adjustment, substantially as andfor the purposes set forth.

17. The combination with a log way and oonveyer of a vertically-swingingcylinder and piston arranged transversely to and adjustable lengthwiseof said logway, and a saw rigidly attached at one end to the piston-rod,substantially as and for the purposes set forth.

ALBERT CUNNINGHAM.

Witnesses:

CHAS. L. Goss, MA IE F. OPPEN.

